mentally speaking, what does estrogen feel like?

for context: i have been on estradiol for 4 months, switched from oral to intramuscular 3 weeks ago, and i have never experienced some great mental effect. i'm sure i would feel worse were i to get off hormones (god willing that does not have to happen ever), but i'm curious. lots of trans girls have told me about how amazing it felt in their mind when they took their first dose, or injected for the first time, things like that. i didn't feel any of that. when i took pills for the first time, i just took pills. when i injected, it just hurt a little bit. what's this amazing feeling?